Data recording method, data outputting method, and data recording and/or reproducing method
US6697306B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Mar 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Output data are embedded with management information including at least one of copy management information and reproduction management information. A modification is applied to part of the management information embedded in the data to create new management information. The new management information is read from the data, and the read new management information is statistically processed to identify this information. Based on an identification result, data recording or reproduction is controlled. For example, a series of watermarks are embedded in content data. With respect to only part of these watermarks, the copy management information is rewritten from one-generation copy permission to copy inhibition. New watermarks are created, are embedded in the content, and are recorded on a medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.